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Wednesday, March 20, 2019

polymers :: essays research papers

Corn stiffen is an example of a polymer. Polymers ar long strains of molecules that keep repeating and have different properties of the original bingle molecule group. A single section of a polymer is called a monomer. It resembles the simplest sort of the repeating portion of the entire polymer. These polymers may get stretched when you make a mixture such as cornstarch and water. This mixture behaves a sealed way. There atomic number 18 many theories on why this may occur. single theory is because the strands get tangled, making it hard for them to slide against each other. Stretched molecules would tour more resistance to movement, like the resistance of a stretched rubber band. However, this end does explain why rapid motion (stirring, shaking, etc.) increases viscosity, which is the property of a suave that offers resistance to flow.Cornstarch and water is a non-Newtonian, organic fluid. Fluids elicit exceed under different sub groups. They are either Non-Newtonian or Newtonian. They can in addition be either organic or non organic. Non&64979Newtonian Fluids are a group of liquids that change viscosity when they are stirred, shaken, or other than agitated. Cornstarch and water acts differently depending on whether it is still or agitated. This mixed bag of fluid is called a dilatant. It becomes more viscous (has a relatively towering resistance to flow) when agitated or compressed. The viscosity of a non-Newtonian fluid is also dependant on temperature. Cornstarch would decrease in viscosity if trust in a boiling pot (it would become thinner). Examples of Newtonian fluids allow in motor oils, mineral oils, gasoline, kerosene, and most salt solutions in water. The most habitual explanation for the behavior of cornstarch and water is that when sitting still, the tiny grains of starch are surrounded by water. The surface tension of the water keeps it from on the whole flowing out of the spaces between the grains. The lubrication of water a llows the granules to move freely. However, if the movement is impolite (shaking, stirring, poking, slapping, etc.) the water is squeezed out from between the granules and the friction between them increases dramatically.Other examples of polymers are present in our everyday lives. Water-resistant paints and varnishes derive from a family of artificial polymers called acrylics. Polystyrene spark, or styrafoam, is used when making cartons to protect eggs, or making wadding peanuts to cushion fragile objects for shipping. It insulates, so people put drinks in foam cups and coolers to keep the warm ones warm and the cold ones cold.